locutus/esm/perl/core/hex.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

export function hex(value) {
    //      discuss at: https://locutus.io/perl/hex/
    // parity verified: Perl 5.40
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //       example 1: hex('FF')
    //       returns 1: 255
    //       example 2: hex('0x10')
    //       returns 2: 16
    //       example 3: hex('zz')
    //       returns 3: 0
    const normalized = String(value).trim().replace(/^0x/i, '');
    const parsed = Number.parseInt(normalized, 16);
    return Number.isNaN(parsed) ? 0 : parsed;
}